My son started Seminary this year. He is NOT a morning person, and sleeps through any alarm, no matter the volume! But
I wake him up at 0525, and he heads for the shower without a fuss. He is "ready for bed" at 9:30, and asleep by 10:00 pm. So far, no reports from school about him sleeping through class...

I
KNOW he does not sleep in Seminary, as my sis is the teacher...
My son has never voiced any objection to attending, but then, it was never a
choice for him. IMO there are some things, as a parent, that are non-negotiable. Soon enough there will come a time in his life when he
will get to decide; when he will be responsible/accountable for ALL of his decisions/choices...but for now, I still get to do some of the choosing for him.
RainofGold, my husband, like yours, is not a member, but, thankfully, he
does support both of us in our Church activities. That makes things easier, for sure. He is the one that gets the pleasure of taking him to the youth events...the Stake dances...the Firesides...
I think it is important for your
(Laurel) daughter to go to Seminary, especially as it is her wish to attend, and to be with her friends; and at 17 years of age, she will know if she is able, physically, to handle it.
Sorry for being so wordy...as most have said, I would encourage them both to attend.
__________________
True Grits
"If you have integrity, nothing else matters.
If you don't have integrity, nothing else matters."
(~~~Alan Simpson~~~)
"If you have men who will exclude any of
God's creatures from the shelter of compassion and pity,
you will have men who will deal likewise with their fellow men."
(~~~St. Francis of Assisi~~~)